If I were to stack a 1.4x and 2x tele, which one should be attached to the camera body to minmise degradation in image quality?
mpenza said:If I were to stack a 1.4x and 2x tele, which one should be attached to the camera body to minmise degradation in image quality?
smallaperture said:Macro lens say 10 elements
1.4x with 5 elements
2.0x with 7 elements
Total is a whopping 22 elements, 44 air/glass surface to reflect light. Light lost due to reflection is already 30 to 40%. Add all sorts of aberrations and the reduction in 3 stops, the poor light ray is not longer razor sharp, but look more like sotong. :nono:
Good luck to you and the poor light ray that needs to meander thru' so many elements. Add that cropping factor of 1.5 if you're using dSLR.
I thought the rule of the thumb is to add ONE teleconverter to a PRIME lens or else it's an utter waste of time and effort. :blah: :blah:
smallaperture said:In photo, break rules = penalty of lower resolution, darker image in the viewfinder, AF hunting.... and unsatisfactory results and frustration. Maybe, a simple cropping might be better. Maybe, try it out and let us all know the results for everybody to learn from the experience and maybe, establish some new rule, new advice to some newbies.
For me, I will stick to the few rules of the thumb. I apply some creativity to composition, lighting, angles etc. :bsmilie: :bsmilie: :bsmilie:
TME said:Just a question.... can teleconvertors be stacked only on primes? What about telezooms?